devout in American

SYNONYMY NOTE: devout implies sincere, worshipful devotion to one's faith or religion; , pious suggests scrupulous adherence to the forms of one's religion but may, in derogatory
usage, connote hypocrisy [the pious burghers who defraud their tenants]; religious stresses faith in a particular religion and constant adherence to its tenets [to lead a religious life]; sanctimonious in current usage implies a hypocritical pretense of piety or devoutness and often
connotes smugness or haughtiness [his sanctimonious disapproval of dancing]